I tried from a my host at DigitalOcean and see this:
$ curl https://download.fedoraproject.org/pub/fedora/linux/releases/test/45_Beta/KDE/x86_64/iso/Fedora-KDE-Desktop-Live-45_Beta-1.3.x86_64.iso -i
HTTP/2 302
x-frame-options: SAMEORIGIN
x-xss-protection: 1; mode=block
x-content-type-options: nosniff
referrer-policy: same-origin
location: https://mirror.ufdroht.net/fedora/fedora/linux/releases/test/45_Beta/KDE/x86_64/iso/Fedora-KDE-Desktop-Live-45_Beta-1.3.x86_64.iso
content-type: text/plain
content-length: 0
date: Tue, 15 Sep 2026 16:59:17 GMT
apptime: D=14718
x-fedora-proxyserver: proxy04.fedoraproject.org
x-fedora-requestid: aql5ZYZTWGmdz1qWRsPnCQBywg0
server: Apache